docs: def ErrorMsg():
      """
      Helper to get a nice traceback as string
      """
      import traceback
  
      limit = None
      _type, value, tb = sys.exc_info()
      _list = traceback.format_tb(tb, limit) + \
          traceback.format_exception_only(_type, value)
      return "Traceback (innermost last):\n" + "%-20s %s" % (
          " ".join(_list[:-1]),
          _list[-1])